calendar month

calendar monthˌcalendar ˈmonth noun [countable]1TMCone of the 12 months of the yearSalaries will be paid at the end of the calendar month.2TMCa period of time from a specificdate in one month to the same date in the next month

Examples from the Corpus

calendar month• Be sure to apply before the first of the calendar month when you want the rebate to start.